get method information

[Xin Tong]

In the jump_from_interpreted code. I have a method in a Register. I think
this is a manifestation of the java method in memory. What is the correct
way to get the properties of the method, e.g., the number of arguments in
the method and the type of the arguments, etc.

void InterpreterMacroAssembler::jump_from_interpreted(Register method,
Register temp) {

  prepare_to_jump_from_interpreted();

  ...
}

Thank you,
Xin